Refuse collection truck

Abstract

To provide a garbage collecting vehicle capable of automatically stopping a loading apparatus or a garbage input box in operation when a predetermined condition is met.SOLUTION: A garbage collecting vehicle includes: a loading apparatus in which garbage input into a garbage input box is stacked into a garbage storage box; a hydraulic pump that operates the loading apparatus; a loading switch that outputs an operation signal for causing the loading apparatus to start an operation; a control unit that controls the operation of the loading apparatus based on an input of the operation signal from the loading switch; and a pressure sensor that detects a working hydraulic pressure of the hydraulic pump. The control unit causes the loading apparatus to stop the operation when an operation time of the loading apparatus is longer than a standard time Ts, the working hydraulic pressure detected by the pressure sensor is higher than a threshold value Pa, and a predetermined time Ta or more has passed since the operation signal is input from the loading switch.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a refuse collection vehicle. [Background technology]

[0002] Generally, a garbage collection vehicle is equipped with a garbage collection box mounted on the vehicle body, a garbage throw-in box that is provided at the rear end of the garbage collection box so as to be able to rotate up and down, and a loading device that loads garbage thrown into the garbage throw-in box into the garbage collection box. The garbage loaded into the garbage collection box is discharged to the outside by rotating the garbage throw-in box upward. The loading operation of the loading device and the vertical rotation of the garbage throw-in box are performed by an operator operating an operation switch (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-199343 A Summary of the Invention [Problem to be solved by the invention]

[0004] After an operator operates the operation switch to operate the loading device or the garbage bin, for example, the loading device or the garbage bin may continue to operate for a long time because the operator leaves the work site. In such a case, it is desirable to automatically stop the loading device or the garbage bin that is in operation.

[0005] The present invention has been made in consideration of the above circumstances, and has an object to provide a garbage collection vehicle that can automatically stop an operating loading device or garbage drop box when certain conditions are met. [Means for solving the problem]

[0006] (1) The garbage collection vehicle of the present invention comprises a garbage storage box, a garbage drop box provided at the rear end of the garbage storage box and into which garbage is dropped, a loading device that loads the garbage dropped into the garbage drop box into the garbage storage box, a hydraulic pump that operates the loading device, a loading operation switch that outputs an operation signal to start the operation of the loading device, a control unit that controls the operation of the loading device based on input of an operation signal from the loading operation switch, and a pressure detection means that detects the hydraulic oil pressure of the hydraulic pump, and the control unit stops the operation of the loading device when the operating time of the loading device is longer than a standard time and the hydraulic oil pressure detected by the pressure detection means exceeds a threshold value and a predetermined time or more has passed since the input of the operation signal from the loading operation switch.

[0007] According to the present invention, for example, there may be a case where an operator mistakenly puts garbage that exceeds the loadable size into a garbage dump box, operates the loading operation switch to start the operation of the loading device, and then while the operator is away from the site, the loading device gets stuck with the garbage and stops working. In this case, the operation time of the loading device becomes longer than the standard time, the hydraulic pressure of the hydraulic pump detected by the pressure detection means exceeds the threshold value, and a predetermined time or more has passed since the operation of the loading operation switch. This allows the loading device, which is operating with garbage stuck in it, to be automatically stopped.

[0008] (2) In the above case, it is preferable that the control unit, after stopping the operation of the loading device, operates the loading device in the reverse direction to a predetermined operating position. In this case, for example, when the loading device stops with garbage caught in it, the caught garbage can be easily removed by operating the loading device in the reverse direction to a predetermined operating position.

[0009] (3) In the above case, it is preferable that the control unit outputs a command to notify the outside after stopping the operation of the loading device. In this case, it is possible to notify workers who have left the site that the operation of the loading device has stopped.

[0010] (4) A garbage collection vehicle of the present invention from another perspective comprises a garbage storage box, a garbage drop box arranged to be rotatable up and down at the rear end of the garbage storage box, a drop box drive device for rotating the garbage drop box up and down, a drive operation switch for outputting an operation signal for starting the operation of the drop box drive device, and a control unit for controlling the drive of the drop box drive device based on input of the operation signal from the drive operation switch, and the control unit stops the drive of the drop box drive device when the drive time of the drop box drive device is longer than a standard time and a predetermined time or more has elapsed since the input of the operation signal from the drive operation switch.

[0011] According to the present invention, for example, when an operator in the cab operates the drive operation switch to rotate the garbage bin, the garbage bin may come into contact with a wall of a building or the like and become unable to rotate, but the operator in the cab may not notice this condition. In this case, the drive time of the garbage bin drive device that rotates the garbage bin becomes longer than the standard time, and the drive of the garbage bin drive device stops when a predetermined time or more has passed since the drive operation switch was operated. This allows the garbage bin that comes into contact with a wall or the like during rotation to be automatically stopped.

[0012] (5) In the above-mentioned case, it is preferable that the control unit in (4) outputs a command to notify the outside after stopping the driving of the input box driving device. In this case, it is possible to notify an operator or the like that the drive of the input box drive device has stopped.

[0013] (6) The drop box drive device is capable of executing a first drive to rotate the garbage drop box upward and a second drive to rotate the garbage drop box downward, and the drive operation switch outputs a first operation signal to start the first drive of the garbage drop box and a second operation signal to start the second drive of the garbage drop box, and when the drive time of the second drive of the drop box drive device is longer than a standard time and a predetermined time or more has elapsed since the second operation signal was input from the drive operation switch, it is preferable that the control unit stops the second drive of the drop box drive device and then causes the drop box drive device to execute the first drive for a certain period of time. In this case, for example, when an operator in the cab operates the drive operation switch to rotate the trash bin downward, if the trash bin comes into contact with a building wall or the like and cannot be rotated downward, the bin drive device stops the second drive and then executes the first drive for a certain period of time. This allows the trash bin, whose downward rotation has been stopped, to be rotated upward for a certain period of time, thereby releasing the trash bin from contact with the wall or the like.

[0014] (7) A garbage collection vehicle of the present invention from another viewpoint comprises a garbage storage box, a garbage drop box provided at the rear end of the garbage storage box into which garbage is dropped, a loading device that loads the garbage dropped into the garbage drop box into the garbage storage box, a hydraulic pump that operates the loading device, a loading operation switch that outputs an operation signal to start the operation of the loading device, a changeover switch for selecting and operating a continuous operation mode in which the loading device repeats a predetermined loading process cycle and a single operation mode in which the loading device executes the loading process cycle only once, and a control unit that controls the operation of the loading device based on input of each operation signal from the loading operation switch and the changeover switch, and the control unit stops the operation of the loading device when the operating oil pressure detected by the pressure detection means falls below a threshold value and a predetermined time or more has elapsed since the operation signal was input from the loading operation switch when the changeover switch selects the continuous operation mode.

[0015] According to the present invention, for example, when a worker selects the continuous operation mode with the changeover switch, operates the loading operation switch to start the operation of the loading device, and leaves the work site, the loading device may complete the loading of garbage and start to run idle. In this case, when the hydraulic pressure of the hydraulic pump falls below the threshold and a predetermined time or more has passed since the loading operation switch was operated, the operation of the loading device stops. This allows the loading device that is running idle in the continuous operation mode to be automatically stopped.

[0016] (8) In the above case, it is preferable that the control unit in (7) outputs a command to notify the outside after stopping the operation of the loading device. In this case, it is possible to notify a worker who has left the site that the loading device operating in the continuous operation mode has stopped. Effect of the Invention

[0017] According to the refuse collection vehicle of the present invention, when a predetermined condition is satisfied, the loading device or the refuse bin in operation can be automatically stopped. [Brief description of the drawings]

[0018] [Figure 1] 1 is a side cross-sectional view of a refuse collection vehicle according to an embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. 1 is a hydraulic circuit diagram of a garbage collection vehicle. [Figure 4] FIG. 4 is a front view of a switch box in the cab. [Diagram 5] FIG. 2 is a block diagram showing a control configuration of a refuse collection vehicle. [Figure 6] 5 is a flowchart showing an example of operation control of the loading device executed by a control unit. [Figure 7] 5 is a flowchart showing an example of operation control of the loading device executed by a control unit. [Figure 8] 10 is a flowchart showing an example of rotation control of the waste bin executed by the control unit. [Figure 9] 10 is a flowchart showing an example of rotation control of the waste bin executed by the control unit. [Figure 10] FIG. 11 is a side cross-sectional view of a refuse collection vehicle showing a modified loading device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. [Overall configuration] Fig. 1 is a side cross-sectional view of a refuse collection vehicle according to an embodiment of the present invention. In Fig. 1, the refuse collection vehicle 1 is equipped with a refuse collection box 2 mounted on a vehicle body 1b behind a driver's cab 1a, and a refuse insertion box 3 provided at the rear end of the refuse collection box 2. An opening 2a is formed on the rear surface of the refuse collection box 2 for loading refuse into the refuse collection box 2. The refuse insertion box 3 has an insertion opening 3a at its rear through which the refuse is inserted, and a cover member 3b for opening and closing the insertion opening 3a.

[0020] The trash dump box 3 can rotate up and down around a fulcrum 3d provided at the top, which allows the opening 2a of the trash storage box 2 to be opened and closed. Specifically, the trash dump box 3 rotates between a downward rotation position (position shown by a solid line in FIG. 1) where the opening 2a of the trash storage box 2 is closed, and an upward rotation position (position shown by a two-dot chain line in FIG. 1) where the opening 2a can be opened by upward rotation to discharge the trash.

[0021] The garbage collection vehicle 1 is equipped with a loading device 4 provided on the garbage dump box 3. The loading device 4 loads garbage dumped into the garbage dump box 3 from the dump port 3a into the garbage storage box 2. The loading device 4 of this embodiment is a press type having a compression stroke in the garbage dumping operation. The loading device 4 has a slider 5 and a push plate 7 rotatably attached to the lower end of the slider 5 via a pin 6. The slider 5 can move along a guide rail 8 provided on the left and right side walls 3c of the garbage dump box 3. On both the left and right sides of the garbage dump box 3, a push cylinder 11 is attached between the slider 5 and the side wall 3c. In addition, a press cylinder 12 is attached between the push plate 7 and the slider 5. In this embodiment, the push cylinder 11 and the press cylinder 12 constitute a loading drive device 10.

[0022] The loading device 4 operates as follows. First, the press cylinder 12 is driven to contract to rotate the push plate 7 counterclockwise from the original position shown by the solid line in Fig. 1, and the push plate 7 is reversed (reversal process). Next, the slider 5 and the push plate 7 are both lowered diagonally backward by driving the push cylinder 11 to contract, and the trash introduced from the introduction port 3a is compressed by the push plate 7 (primary compression process). Then, the press cylinder 12 is driven to expand to rotate the push plate 7 clockwise, and the trash is secondarily compressed (secondary compression process).

[0023] Next, from the state shown by the two-dot chain line in Fig. 1, the push cylinder 11 is extended to raise the slider 5 and the push plate 7 diagonally forward to the state shown by the solid line in Fig. 1, and the secondarily compressed trash is pushed into the trash storage box 2 (pushing process). In this way, the loading device 4 can load the trash thrown into the trash throw-in box 3 into the trash storage box 2 through a loading process cycle consisting of the reversing process, the primary compression process, the secondary compression process, and the pushing process.

[0024] A discharge plate 18 is provided inside the trash collection box 2 so as to be movable back and forth. A telescopic discharge cylinder (discharge drive device) 19 is connected to the discharge plate 18. The discharge plate 18 can be moved between the rearmost position shown by the solid line in Fig. 1 and the frontmost position shown by the two-dot chain line in Fig. 1 by the extension and contraction drive of the discharge cylinder 19.

[0025] When the trash storage box 2 is empty, the discharge plate 18 is in the rearmost position, and the trash loaded into the trash storage box 2 by the push plate 7 is compressed between the push plate 7 and the discharge plate 18. Then, the discharge cylinder 19 is gradually contracted to move the discharge plate 18 forward. In addition, with the trash input box 3 in the upper rotation position, the discharge cylinder 19 is extended to move the discharge plate 18 backward, so that the trash stored in the trash storage box 2 can be discharged to the outside through the opening 2a.

[0026] 2 is a rear view of the refuse collection vehicle 1. The refuse collection vehicle 1 is equipped with a swing cylinder (drop-in box drive device) 20 that rotates the refuse drop box up and down relative to the refuse collection box 2. The swing cylinders 20 are disposed on both the left and right sides of the refuse drop box 3. One end of the swing cylinder 20 is attached to the side of the refuse collection box 2, and the other end of the swing cylinder 20 is attached to the refuse drop box 3.

[0027] The swing cylinder 20 can execute a first drive for rotating the trash bin 3 upward and a second drive for rotating the trash bin 3 downward. In the first drive, the swing cylinder 20 is driven to extend, causing the trash bin 3 to rotate upward. In the second drive, each swing cylinder 20 is driven to contract, causing the trash bin 3 to rotate downward.

[0028] [Hydraulic circuit] 3 is a hydraulic circuit diagram relating to the push cylinder 11, the press cylinder 12, the discharge cylinder 19, and the swing cylinder 20. This hydraulic circuit is configured by connecting an oil tank 21, a hydraulic pump 22, pressure control valves 23a-23f, a push cylinder electromagnetic switching valve 24, a press cylinder electromagnetic switching valve 25, a discharge cylinder electromagnetic switching valve 26, a swing cylinder electromagnetic switching valve (also serves as a tailgate lock electromagnetic valve) 27, switching valves 28a-28b, check valves 29a-29g, filters 30a-30b, a tailgate lock (cylinder) 31, and a pressure sensor (pressure detection means) 32 as shown in the figure.

[0029] The hydraulic pump 22 discharges hydraulic oil to drive the push cylinder 11 and the press cylinder 12, thereby operating the loading device 4. The hydraulic pump 22 also discharges hydraulic oil to drive the discharge cylinder 19, thereby moving the discharge plate 18 back and forth. The hydraulic pump 22 also discharges hydraulic oil to drive the swing cylinder 20, thereby rotating the trash bin 3 up and down. The pressure sensor 32 detects the hydraulic pressure of the hydraulic pump 22.

[0030] When the solenoid 25s of the press cylinder electromagnetic switching valve 25 is excited, the press cylinder 12 is driven to contract (reverse rotation process). When the solenoid 25e of the press cylinder electromagnetic switching valve 25 is excited, the press cylinder 12 is driven to extend (secondary compression process). When the solenoid 24s of the push cylinder electromagnetic switching valve 24 is excited, the push cylinder 11 is driven to contract (primary compression process). When the solenoid 24e of the push cylinder electromagnetic switching valve 24 is excited, (push process in which the push cylinder 11 is driven to extend).

[0031] When the solenoid 26e of the discharge cylinder electromagnetic switching valve 26 is excited, the discharge cylinder 19 is driven to extend. When the solenoid 26s of the discharge cylinder electromagnetic switching valve 26 is excited, the discharge cylinder 19 is driven to contract.

[0032] When the solenoid 27e of the swing cylinder electromagnetic switching valve 27 is excited, the tailgate lock 31 operates in the unlocking direction, the swing cylinder 20 is extended, and the garbage bin 3 rotates upward. When the solenoid 27e of the swing cylinder electromagnetic switching valve 27 is demagnetized and the switching valve 28b is excited, the swing cylinder 20 is contracted, and the garbage bin 3 rotates downward. After the garbage bin 3 reaches the downward rotation position, when the solenoid 27s of the swing cylinder electromagnetic switching valve 27 is excited, the tailgate lock 31 performs a locking operation, and the garbage bin 3 is locked.

[0033] [Switch box] Fig. 4 is a front view showing a switch box SB1 provided in the driver's cab 1a. The switch box SB1 is provided with a main switch 33, an open / close switch (drive operation switch) 34, a discharge switch 35, a scraping switch 36, a PTO changeover switch 37, a main lamp 38, a lock lamp 39, and an alarm buzzer 40 (see Fig. 5). The switches 33 to 37, the lamps 38 and 39, and the alarm buzzer 40 are connected to a control unit 50 (see Fig. 5).

[0034] The main switch 33 is a switch that is switched to any one of the positions of "LOAD", "OFF", and "DISCHARGE", and is, for example, an alternate type toggle switch. When the main switch 33 is "OFF", the drive of each of the push cylinder 11, the press cylinder 12, the discharge cylinder 19, and the swing cylinder 20 is restricted.

[0035] When the main switch 33 is switched from "OFF" to "LOADING", the drive of each of the push cylinder 11 and the press cylinder 12 is permitted. This allows the operation of each of the switches 41 to 44 of the switch boxes SB2 and SB3, which will be described later. When the main switch 33 is switched from "OFF" to "discharge", the drive of the discharge cylinder 19 and the swing cylinder 20 is permitted. This allows the switching operations of the open / close switch 34, the discharge switch 35, and the scraping switch 36.

[0036] The open / close switch 34 is a switch that is operated to rotate the trash bin 3 up and down. The open / close switch 34 in this embodiment is a switch that is switched to any one of the positions "up," "off," and "down," and is, for example, a momentary toggle switch.

[0037] When the open / close switch 34 is switched from "OFF" to "up", it outputs an operation signal (first operation signal) to the control unit 50 to start the extension drive of the swing cylinder 20. As a result, the swing cylinder 20 is extended and the trash bin 3 rotates upward. When the open / close switch 34 is switched from "OFF" to "down", it outputs an operation signal (second operation signal) to the control unit 50 to start the contraction drive of the swing cylinder 20. As a result, the swing cylinder 20 is contracted and the trash bin 3 rotates downward.

[0038] The discharge switch 35 is a switch that is operated to move the discharge plate 18 back and forth. In this embodiment, the discharge switch 35 is a switch that is switched to any one of the positions "discharge," "OFF," and "return," and is, for example, a momentary toggle switch. When the discharge switch 35 is switched from "OFF" to "discharge," the discharge cylinder 19 is driven to extend, and the discharge plate 18 moves backward. When the discharge switch 35 is switched from "OFF" to "return," the discharge cylinder 19 is driven to contract, and the discharge plate 18 moves forward.

[0039] The scraping switch 36 is a switch that can be switched to any one of the positions "AUTO", "OFF", and "MANUAL", and is, for example, a toggle switch that combines an alternate type and a momentary type. The "AUTO" side of the scraping switch 36 is an alternate contact, and the "MANUAL" side of the scraping switch 36 is a momentary contact.

[0040] When the scooping switch 36 is switched to "automatic", the loading device 4 automatically performs one loading process cycle when the garbage bin 3 is rotated to the upper rotation position by operating the opening / closing switch 34. This makes it possible to remove garbage remaining in the garbage bin 3. When the scooping switch 36 is switched to "manual" and the garbage bin 3 is rotated to the upper rotation position by operating the opening / closing switch 34 while the scooping switch 36 is in the "OFF" state, the loading device 4 performs one loading process cycle. This makes it possible to remove garbage remaining in the garbage bin 3.

[0041] The PTO changeover switch 37 is a switch that can be switched to either the "work" or "end" position, and is, for example, a rocker switch. When the PTO changeover switch 37 is switched to "work", the travel engine (not shown) of the refuse collection vehicle 1 and the hydraulic pump 22 are connected via the PTO. This allows the hydraulic pump 22 to be driven. When the PTO changeover switch 37 is switched to "end", the connection between the travel engine and the hydraulic pump 22 by the PTO is cut. This restricts the drive of the hydraulic pump 22 and allows the refuse collection vehicle 1 to travel.

[0042] The main lamp 38 is turned on when each switch of the switch box SB1 can be operated. The lock lamp 39 is turned on when the tailgate lock 31 is in the locked state. The alarm buzzer 40 sounds when the operation of the loading device 4 or the trash bin 3 automatically stops, as described below. The alarm buzzer 40 may be provided outside the driver's cab 1a (in the trash storage bin 2, etc.).

[0043] 2, switch boxes SB2 and SB3 are provided at the rear of both left and right side walls 3c of the trash bin 3. The left switch box SB2 is provided with a changeover switch 41, a loading switch (loading operation switch) 42, and an emergency stop switch 43. The switches 41 to 43 of the switch box SB2 are connected to a control unit 50.

[0044] The changeover switch 41 is a switch for selecting either a continuous operation mode in which the loading device 4 repeats a loading process cycle, or a single operation mode in which the loading device 4 executes the loading process cycle only once (one cycle). The changeover switch 41 in this embodiment is, for example, an alternate type toggle switch that is switched to either the position "continuous" which is a continuous operation mode, or the position "single" which is a single operation mode.

[0045] The loading switch 42 is a switch that outputs an operation signal to the control unit 50 to start operation in each operation mode of the loading device 4, and is, for example, a momentary push button switch. When the loading switch 42 is turned on, the push cylinder 11 and the press cylinder 12 are each driven to extend and retract, and a loading process cycle is executed by the slider 5 and the push plate 7. The emergency stop switch 43 is a switch for stopping the operation of the loading device 4, and is, for example, a momentary push button switch.

[0046] The right switch box SB3 is provided with an emergency stop switch 44. The emergency stop switch 44 is a switch for stopping the operation of the loading device 4, similar to the emergency stop switch 43, and is, for example, a momentary push button switch. The emergency stop switch 44 is connected to the control unit 50.

[0047] [Control configuration] 5 is a block diagram showing the control configuration of the garbage collection vehicle 1. The garbage collection vehicle 1 is equipped with a control unit 50 that controls the operations of the loading device 4, the discharge plate 18, and the garbage dump box 3. The control unit 50 is a microcomputer composed of a CPU, a memory, etc.

[0048] The control unit 50 receives operation signals from the switches 33-37 of the switch box SB1, operation signals from the switches 41-43 of the switch box SB2, and an operation signal from the emergency stop switch 44 of the switch box SB3. In addition, the control unit 50 receives a detection signal from the pressure sensor 32.

[0049] The control unit 50 controls the switching of the push cylinder electromagnetic switching valve 24 and the press cylinder electromagnetic switching valve 25 based on the input of operation signals from the change-over switch 41 and the loading switch 42, respectively, and the input of a detection signal from the pressure sensor 32. In this way, the extension and contraction drive of the push cylinder 11 and the press cylinder 12 (the operation of the loading device 4) is controlled by the control unit 50.

[0050] When an operation signal is input from the emergency stop switches 43, 44, the control unit 50 controls the switching of the push cylinder electromagnetic switching valve 24 and the press cylinder electromagnetic switching valve 25, respectively, to stop the extension and retraction drive of the push cylinder 11 and the press cylinder 12 (the operation of the loading device 4).

[0051] The control unit 50 controls the switching of the swing cylinder electromagnetic switching valve 27 based on the input of an operation signal from the open / close switch 34. As a result, the extension and contraction drive of the swing cylinder 20 (the up and down rotation of the trash bin 3) is controlled by the control unit 50.

[0052] The control unit 50 controls the switching of the discharge cylinder electromagnetic switching valve 26 based on the input of an operation signal from the discharge switch 35. As a result, the extension and contraction drive of the discharge cylinder 19 (the forward and backward movement of the discharge plate 18) is controlled by the control unit 50. The control unit 50 controls the turning on and off of the main lamp 38 and the lock lamp 39 .

[0053] The control unit 50 incorporates a first timer 51, a second timer 52, a third timer 53, a fourth timer 54, and a fifth timer 55. The first timer 51 and the second timer 52 start counting from the time when an operation signal from the loading switch 42 is input to the control unit 50. After starting counting, the first timer 51 and the second timer 52 stop counting when any of the switches 33 to 37, 41 to 44 is operated. This allows the control unit 50 to monitor, by the first timer 51 or the second timer 52, the no-operation time during which none of the switches 33 to 37, 41 to 44 is operated after the loading switch 42 is turned on.

[0054] The third timer 53 starts counting from the time when the loading device 4 starts the operation of the loading process cycle, that is, from the time when the push plate 7 starts the reversing process. The time when the push plate 7 starts the reversing process can be determined, for example, by whether or not a position sensor (not shown) that detects the original position becomes non-detecting when the push plate 7 starts reversing from the original position. As this position sensor, a limit switch or the like used to control the operation of the loading device 4 can be used. This allows the control unit 50 to monitor the operating time of the loading device 4 by the third timer 53.

[0055] The fourth timer 54 starts counting from the point in time when an operation signal is input to the control unit 50 when the open / close switch 34 is switched to "up" or "down". Then, the fourth timer 54 stops counting when the open / close switch 34 is switched to another position after starting counting, or when any of the other switches 33, 35-37, 41-44 is operated. This allows the control unit 50 to monitor, using the fourth timer 54, the duration of operation during which the open / close switch 34 is continuously operated after it is switched to "up" or "down".

[0056] The fifth timer 55 starts counting from the time when the swing cylinder 20 starts telescopic driving. The time when the swing cylinder 20 starts telescopic driving can be determined, for example, by whether or not a position sensor (not shown) detecting the downward rotation position (or upward rotation position) of the garbage throw box 3 becomes non-detecting when the garbage throw box 3 starts to rotate upward (or downward). As this position sensor, a limit switch or the like used to control the upward and downward rotation of the garbage throw box 3 can be used. This allows the control unit 50 to monitor the driving time of the swing cylinder 20 by the fifth timer 55.

[0057] [Loading device operation control] 6 and 7 are flow charts showing an example of the operation control of the loading device 4 executed by the control unit 50. The circled letter I in FIG. 6 is connected to the same letter I in FIG. 7. The circled letters II and III in FIG. 7 are connected to the same letters II and III in FIG. 6, respectively. Hereinafter, the operation control of the loading device 4 will be described with reference to FIG. 6 and FIG. 7. Here, the description starts from a state where an operator switches the PTO changeover switch 37 to "work" and the main switch 33 to "loading".

[0058] The control unit 50 first judges whether or not an operation signal is input by turning on the loading switch 42 (step ST1). If an operation signal is not input from the loading switch 42 (No in step ST1), the control unit 50 proceeds to step ST12, which will be described later. If an operation signal is input from the loading switch 42 (Yes in step ST1), the control unit 50 starts counting the first timer 51 and the second timer 52 (step ST2).

[0059] Next, the control unit 50 starts the operation of the loading device 4 (step ST3). Specifically, the control unit 50 controls the switching of the push cylinder electromagnetic switching valve 24 and the press cylinder electromagnetic switching valve 25 so that the loading device 4 performs a loading process cycle, and drives the push cylinder 11 and the press cylinder 12 to extend and retract. Then, the control unit 50 starts counting the third timer 53 from the point in time when the loading device 4 starts operating (step ST4).

[0060] Next, the control unit 50 judges whether or not the count time of the third timer 53, i.e., the operation time of the loading device 4, is longer than a preset standard time Ts (step ST5). The standard time Ts is, for example, an average time required for the loading device 4 to perform one loading process cycle.

[0061] If the operation time of the loading device 4 is longer than the standard time Ts (Yes in step ST5), the control unit 50 judges whether or not the hydraulic pressure of the hydraulic pump 22 detected by the pressure sensor 32 exceeds a preset threshold value Pa (step ST6). The threshold value Pa is, for example, the maximum hydraulic pressure of the hydraulic pump 22 when the loading device 4 loads an average amount of garbage in one loading process cycle. If the hydraulic pressure of the hydraulic pump 22 is equal to or lower than the threshold value Pa (No in step ST6), the control unit 50 judges that the loading device 4 is operating normally, and returns to the judgment in step ST5.

[0062] If the hydraulic pressure of the hydraulic pump 22 exceeds the threshold value Pa (Yes in step ST6), the control unit 50 judges whether or not the count time of the first timer 51, that is, the no-operation time since the loading switch 42 was turned on, has elapsed a preset predetermined time Ta or more (step ST7). The predetermined time Ta is set to a time longer than the standard time Ts. If the no-operation time is shorter than the predetermined time Ta (No in step ST7), the control unit 50 judges that the loading device 4 is operating normally, and returns to the judgment in step ST5.

[0063] If the non-operation time has elapsed for the predetermined time Ta or more (Yes in step ST7), the control unit 50 determines that the loading device 4 is not operating normally, and stops the operation of the loading device 4 (step ST8). Specifically, the control unit 50 controls the switching of the push cylinder electromagnetic switching valve 24 and the press cylinder electromagnetic switching valve 25, and stops the extension and retraction drive of the push cylinder 11 and the press cylinder 12.

[0064] After stopping the operation of the loading device 4, the control unit 50 outputs a command to the external alarm buzzer 40 to sound (issue an alarm) (step ST9). Then, after stopping the operation of the loading device 4, the control unit 50 operates the loading device 4 in the reverse direction to a predetermined operating position (step ST10). The reason for operating the loading device 4 in the reverse direction in this manner is to remove any debris caught in the loading device 4. For this reason, it is preferable that the predetermined operating position is a position where the reversal of the push plate 7 is completed by the reversal process, or a position where the push plate 7 is partially reversed by the reversal process.

[0065] Here, "operating the loading device 4 in the reverse direction" includes not only the case where each step of the loading process cycle is operated in the reverse direction one by one, but also the case where a plurality of steps of the loading process cycle are operated in the reverse direction simultaneously. For example, when operating the loading device 4 in the reverse direction from the position where the secondary compression process is completed to the position where the reversal process is completed (predetermined operating position), the secondary compression process and the primary compression process may be operated in the reverse direction in that order, or the secondary compression process and the primary compression process may be operated in the reverse direction simultaneously. In the latter case, the press cylinder 12 is contracted to rotate the pushing plate 13 in the counterclockwise direction in FIG. 1, while the push cylinder 11 is extended to raise the slider 5 diagonally forward. This allows the loading device 4 to be quickly moved to the predetermined operating position.

[0066] Next, the control unit 50 stops and resets each of the counts of the first timer 51, the second timer 52, and the third timer 53 (step ST11). Then, the control unit 50 judges whether or not the main switch 33 has been switched to "OFF" (step ST12). If the main switch 33 has not been switched to "OFF" (No in step ST12), the control unit 50 returns to step ST1. On the other hand, if the main switch 33 has been switched to "OFF" (Yes in step ST12), the control unit 50 ends the process.

[0067] In step ST5, if the operation time of the loading device 4 is equal to or shorter than the standard time Ts (No in step ST5), the control unit 50 judges whether or not an operation signal is input by turning on either of the emergency stop switches 43, 44 (step ST13). If an operation signal is input from either of the emergency stop switches 43, 44 (Yes in step ST13), the control unit 50 stops the operation of the loading device 4 (step ST14) and proceeds to step ST11.

[0068] If no operation signal has been input from either of the emergency stop switches 43, 44 (No in step ST13), the control unit 50 judges whether or not the loading device 4 has completed one loading process cycle (step ST15). Specifically, the control unit 50 judges whether or not the position sensor detects that the push plate 7 is in the original position. If the loading device 4 has not completed one cycle (No in step ST15), the control unit 50 returns to the judgment in step ST5.

[0069] When the loading device 4 completes one cycle (Yes in step ST15), the control unit 50 judges whether or not the changeover switch 41 selects the continuous operation mode (step ST16). Specifically, the control unit 50 judges whether or not an operation signal to be output when the changeover switch 41 is in the "continuous" position has been input. When the changeover switch 41 has not selected the continuous operation mode (No in step ST16), the control unit 50 judges that the changeover switch 41 has selected the single operation mode, and proceeds to step ST14.

[0070] When the changeover switch 41 selects the continuous operation mode (Yes in step ST16), the control unit 50 determines whether the hydraulic pressure of the hydraulic pump 22 detected by the pressure sensor 32 is below a preset threshold value Pb (step ST17). The threshold value Pb is, for example, the minimum value of the hydraulic pressure of the hydraulic pump 22 when the loading device 4 is idling.

[0071] When the hydraulic pressure of the hydraulic pump 22 is below the threshold value Pb (Yes in step ST17), the control unit 50 judges whether or not the count time of the second timer 52, that is, the non-operation time from when the loading switch 42 is turned on, has elapsed a preset predetermined time Tb or more (step ST18). The predetermined time Tb is set to a time longer than the standard time Ts (for example, an average time required for the loading device 4 to perform ten loading process cycles in the continuous operation mode).

[0072] If the non-operation time is equal to or longer than the predetermined time Tb, the control unit 50 stops the operation of the loading device 4 (step ST19). After stopping the operation of the loading device 4, the control unit 50 outputs a command to the external alarm buzzer 40 to sound (issue an alarm) (step ST20), and proceeds to step ST11.

[0073] If the hydraulic pressure of the hydraulic pump 22 is equal to or higher than the threshold value Pb (No in step ST17), or if the non-operation time is less than the predetermined time Tb (No in step ST18), the control unit 50 stops and resets the third timer 53 (step ST21). Then, the control unit 50 restarts the counting of the third timer 53 (step ST22) and returns to the judgment in step ST5. At this time, the control unit 50 continues the loading process cycle operation of the loading device 4.

[0074] As described above, according to the garbage collection vehicle 1 of this embodiment, for example, an operator may mistakenly put garbage exceeding the loadable size into the garbage dump box 3, operate the loading switch 42 to start the operation of the loading device 4, and while leaving the site, the loading device 4 may get stuck with the garbage and become stuck. In this case, the control unit 50 stops the operation of the loading device 4 when the operation time of the loading device 4 becomes longer than the standard time Ts, the operating oil pressure of the hydraulic pump 22 detected by the pressure sensor 32 exceeds the threshold value Pa, and the non-operation time after the loading switch 42 is turned on has elapsed for a predetermined time Ta or more. This makes it possible to automatically stop the loading device 4 operating with garbage stuck in it.

[0075] In addition, after the control unit 50 stops the operation of the loading device 4 as described above, it operates the loading device 4 in the reverse direction to a predetermined operating position, so that the worker can easily remove the trapped garbage.

[0076] In addition, after stopping the operation of the loading device 4 as described above, the control unit 50 outputs a command to the alarm buzzer 40 to sound an alarm, so that workers who have left the site can be notified that the operation of the loading device 4 has stopped.

[0077] Also, for example, there may be cases where an operator selects the continuous operation mode with the changeover switch 41, operates the loading switch 42 to start the operation of the loading device 4, and then leaves the work site, during which time the loading device 4 completes loading of garbage and starts to run idle. In this case, the control unit 50 stops the operation of the loading device 4 when the operating oil pressure of the hydraulic pump 22 falls below the threshold value Pb and a predetermined time Tb or more has elapsed since the loading switch 42 was operated. This makes it possible to automatically stop the loading device 4 that is running idle in the continuous operation mode.

[0078] In addition, after the control unit 50 stops the operation of the loading device 4 that is running idly in the continuous operation mode as described above, it outputs a command to the alarm buzzer 40 to sound, so that workers who have left the site can be notified that the loading device 4, which is operating in the continuous operation mode, has stopped.

[0079] [Rotation control of the garbage dump box] 8 and 9 are flow charts showing an example of rotation control of the garbage bin 3 executed by the control unit 50. The circled letters IV in FIG. 8 are connected to the same letters IV in FIG. 9. The circled letters V and VI in FIG. 9 are connected to the same letters V and VI in FIG. 8, respectively. Hereinafter, the rotation control of the garbage bin 3 will be described with reference to FIG. 8 and FIG. 9. Here, the description starts from a state where the worker switches the PTO changeover switch 37 to "work" and the main switch 33 to "discharge".

[0080] The control unit 50 first determines whether the open / close switch 34 has been switched to "up" (step ST41). Specifically, the control unit 50 determines whether an operation signal (first operation signal) that is output when the open / close switch 34 is switched to "up" has been input. When the open / close switch 34 has been switched to "up" (Yes in step ST41), the control unit 50 starts counting the fourth timer 54 (step ST42).

[0081] Next, the control unit 50 controls the switching of the electromagnetic switching valve 27 for the swing cylinder to start the extension drive (first drive) of the swing cylinder 20 (step ST43). As a result, the trash bin 3 starts to rotate upward. Then, the control unit 50 starts counting the fifth timer 55 from the point when the swing cylinder 20 starts the extension drive (step ST44).

[0082] Next, the control unit 50 determines whether the open / close switch 34 continues to be switched to "up" (step ST45). Specifically, the control unit 50 determines whether the operation signal output when the open / close switch 34 is switched to "up" continues to be input.

[0083] If the open / close switch 34 continues to be switched to "up" (Yes in step ST45), the control unit 50 judges whether the count time of the fifth timer 55, i.e., the extension drive time of the swing cylinder 20, is longer than a preset standard time Tm (step ST46). The standard time Tm is, for example, the time required to rotate the trash bin 3 from the lower rotation position to the upper rotation position. If the extension drive time of the swing cylinder 20 is equal to or shorter than the standard time Tm (No in step ST46), the control unit 50 returns to the judgment of step ST45.

[0084] If the extension drive time of the swing cylinder 20 is longer than the standard time Tm (Yes in step ST46), the control unit 50 judges whether or not the count time of the fourth timer 54, that is, the operation duration time after the opening / closing switch 34 is switched to "up" has elapsed a preset predetermined time Tc or more (step ST47). The standard time Tc is set to a time longer than the standard time Tm. If the operation duration time of the opening / closing switch 34 is shorter than the predetermined time Tc (No in step ST47), the control unit 50 returns to the judgment of step ST45.

[0085] If the operation duration of the open / close switch 34 is longer than the predetermined time Tc (Yes in step ST47), the control unit 50 determines that the garbage bin 3 is not rotating upward normally, and switches and controls the swing cylinder electromagnetic switching valve 27 to stop the extension drive of the swing cylinder 20 (step ST48). After stopping the extension drive of the swing cylinder 20, the control unit 50 outputs a command to the external alarm buzzer 40 to sound (alert) (step ST49).

[0086] Next, the control unit 50 stops and resets the counts of the fourth timer 54 and the fifth timer 55 (step ST50). Then, the control unit 50 judges whether or not the main switch 33 has been switched to "OFF" (step ST51). If the main switch 33 has not been switched to "OFF" (No in step ST51), the control unit 50 returns to step ST41. On the other hand, if the main switch 33 has been switched to "OFF" (Yes in step ST51), the control unit 50 ends the process.

[0087] In step ST45, if the open / close switch 34 is not continuing to be switched to "up" (No in step ST45), the control unit 50 determines that the open / close switch 34 has been switched to another position, and switches and controls the swing cylinder electromagnetic switching valve 27 to stop the extension drive of the swing cylinder 20 (step ST52). Then, the control unit 50 proceeds to step ST50.

[0088] In step ST41, if the opening / closing switch 34 has not been switched to "up" (No in step ST41), the control unit 50 determines whether or not the opening / closing switch 34 has been switched to "down" (step ST53). Specifically, the control unit 50 determines whether or not an operation signal (second operation signal) that is output when the opening / closing switch 34 has been switched to "down" has been input. If the opening / closing switch 34 has not been switched to "down" (No in step ST53), the control unit 50 proceeds to step ST51.

[0089] When the open / close switch 34 is switched to "down" (Yes in step ST53), the control unit 50 starts counting the fourth timer 54 (step ST54). Next, the control unit 50 controls the switching of the electromagnetic switching valve 27 for the swing cylinder to start the contraction drive (second drive) of the swing cylinder 20 (step ST55). This causes the garbage dump box 3 to start rotating downward. Then, the control unit 50 starts counting the fifth timer 55 from the point in time when the swing cylinder 20 starts the contraction drive (step ST56).

[0090] Next, the control unit 50 judges whether the state in which the open / close switch 34 is switched to "down" continues (step ST57). Specifically, the control unit 50 judges whether the operation signal to be output when the open / close switch 34 is switched to "down" continues to be input.

[0091] If the open / close switch 34 continues to be switched to "down" (Yes in step ST57), the control unit 50 judges whether the count time of the fifth timer 55, i.e., the contraction drive time of the swing cylinder 20, is longer than a preset standard time Tn (step ST58). The standard time Tn is, for example, the time required to rotate the trash bin 3 from the upper rotation position to the lower rotation position. If the contraction drive time of the swing cylinder 20 is equal to or shorter than the standard time Tn (No in step ST58), the control unit 50 returns to the judgment of step ST57.

[0092] If the contraction drive time of the swing cylinder 20 is longer than the standard time Tn (Yes in step ST58), the control unit 50 judges whether or not the count time of the fourth timer 54, that is, the operation duration time after the opening / closing switch 34 is switched to "down" has elapsed a preset predetermined time Td or more (step ST59). The standard time Td is set to a time longer than the standard time Tn. If the operation duration time of the opening / closing switch 34 is shorter than the predetermined time Td (No in step ST59), the control unit 50 returns to the judgment of step ST57.

[0093] If the duration of operation of the opening / closing switch 34 is longer than the predetermined time Td (Yes in step ST59), the control unit 50 determines that the garbage dump box 3 is not rotating downward normally, and switches and controls the electromagnetic switching valve 27 for the swing cylinder to stop the contraction drive of the swing cylinder 20 (step ST60).

[0094] After stopping the retraction drive of the swing cylinder 20, the control unit 50 outputs a command to sound (alert) the external alarm buzzer 40 (step ST61). Then, after stopping the retraction drive (second drive) of the swing cylinder 20, the control unit 50 drives the swing cylinder 20 to extend (first drive) for a certain period of time (e.g., several seconds) (step ST62). As a result, the garbage dump box 3 rotates upward for a certain period of time from the position where the downward rotation was stopped. The swing cylinder 20 is driven to extend in this manner in order to release the garbage dump box 3 from abutment against a wall or the like. After driving the swing cylinder 20 to extend for a certain period of time, the control unit 50 proceeds to step ST50.

[0095] In step ST57, if the open / close switch 34 is not continuing to be switched to "down" (No in step ST57), the control unit 50 determines that the open / close switch 34 has been switched to another position, and switches and controls the swing cylinder electromagnetic switching valve 27 to stop the contraction drive of the swing cylinder 20 (step ST63). Then, the control unit 50 proceeds to step ST50.

[0096] As described above, according to the garbage collection vehicle 1 of this embodiment, for example, when an operator in the cab 1a operates the open / close switch 34 to rotate the garbage bin 3 upward (downward), even if the garbage bin 3 abuts against a wall of a building or the like and cannot be rotated upward (downward), the operator in the cab 1a may not notice this state. In this case, the control unit 50 stops the extension drive (contraction drive) of the swing cylinder 20 when the drive time of the swing cylinder 20 that rotates the garbage bin 3 becomes longer than the standard time Tm (Tn) and a predetermined time Tc (Td) or more has elapsed since the open / close switch 34 was switched. This makes it possible to automatically stop the garbage bin 3 that abuts against a wall or the like during the upward rotation (downward rotation) and cannot be rotated.

[0097] In addition, since the control unit 50 outputs a command to sound the alarm buzzer 40 after stopping the extension drive (contraction drive) of the swing cylinder 20 as described above, it is possible to notify the worker in the operator's cab 1a that the extension drive (contraction drive) of the swing cylinder 20 has stopped. Note that after stopping the swing cylinder 20, the swing cylinder 20 may be contracted for a certain period of time to release the contact of the trash bin 3 with the wall or the like.

[0098] Also, for example, when an operator in the cab 1a operates the open / close switch 34 to rotate the garbage bin 3 downward, if the garbage bin 3 comes into contact with a wall of a building or the like and cannot rotate downward, the control unit 50 stops the contraction drive of the swing cylinder 20 and then drives the swing cylinder 20 to extend for a certain period of time. This allows the garbage bin 3, which has stopped rotating downward, to be rotated upward for a certain period of time, so that the garbage bin 3 can be released from contact with the wall or the like.

[0099] [others] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not by the above meaning, and is intended to include all modifications within the scope of the claims and the meaning equivalent thereto.

[0100] For example, the garbage collection vehicle 1 of this embodiment discharges garbage to the outside by a discharge plate 18 provided in the garbage storage box 2, but the garbage storage box 2 may be dumped to discharge the garbage to the outside. Also, the loading device 4 of this embodiment is a press type that loads garbage only with a push plate 7, but as shown in Fig. 10, it may be a rotary plate type that loads garbage by cooperation between a push plate 13 that swings back and forth and a rotatable rotary plate 14.

[0101] In the case where the loading device 4 is of the rotating plate type, the predetermined operating position when the loading device 4 is operated in the reverse direction to a predetermined operating position after the operation of the loading device 4 is stopped is preferably set to the 12 o'clock rotation position in Fig. 10 when the pushing plate 13 is in the forward swing position (solid line position in Fig. 10), and set to the 2 o'clock rotation position in Fig. 10 where the rotating plate 14 does not interfere with the pushing plate 13 when the pushing plate 13 is in the rear swing position (double-dotted chain line position in Fig. 10) or in a position midway through swinging. This makes it possible to remove trash caught between the tip of the rotating plate 14 and the bottom surface 3e of the trash bin 3.

[0102] In addition, the predetermined time Ta and the predetermined time Tb in this embodiment may be the same value or different values. Similarly, the predetermined time Tc and the predetermined time Td may be the same value or different values. In addition, the standard time Tm and the standard time Tn in this embodiment may be the same value (the longer time of Tm and Tn) or different values.

[0103] In this embodiment, the operation time (standard time Ts) and the hydraulic pressure (threshold value Pa) of one loading process cycle are used as the operation time of the loading device 4 and the hydraulic pressure of the hydraulic pump 22, which are conditions for stopping the operation of the loading device 4, but the operation time and the hydraulic pressure in each process of the loading process cycle may be used. In that case, the control unit 50 can determine which process the loading device 4 is currently in by using multiple position sensors that detect the position of the push plate 7 when each process is completed in order to sequentially control the loading process cycle.

[0104] The loading device 4 of this embodiment is of a cyclic operation type that performs a loading process cycle, but it may be of a type that operates continuously (without cyclic operation) like a screw type that loads garbage by rotating a screw. In that case, when a predetermined time has elapsed since an operation signal was input, which is one condition for stopping the operation of the loading device, it may be when a predetermined time has elapsed since an operation signal was input from the loading switch 42 that starts the screw of the loading device 4.

[0105] In this embodiment, when the control unit 50 outputs a command to notify the outside, the alarm buzzer 40 sounds to audibly warn the worker, but in addition to or instead of the audible warning, a visual warning such as turning on a warning lamp or displaying text information may be given. In that case, the visual warning allows the worker to easily understand the state of the loading device 4 and the trash bin 3. [Explanation of symbols]

[0106] 1. Refuse collection truck 2. Dustbin 3 Garbage disposal box 4 Loading device 20 Swing cylinder (feed box drive device) 22 Hydraulic pump 32 Pressure sensor (pressure detection means) 34 Opening / closing switch (drive operation switch) 41 Changeover switch 42 Loading switch (loading operation switch) 50 Control section

Claims

1. A dustbin; a trash input box provided at a rear end of the trash storage box and into which trash is input; a loading device that loads the trash thrown into the trash throwing box into the trash storage box; A hydraulic pump for operating the loading device; a loading operation switch that outputs an operation signal to start the operation of the loading device; a control unit that controls an operation of the loading device based on an input of an operation signal from the loading operation switch; a pressure detection means for detecting an operating oil pressure of the hydraulic pump; The control unit stops the operation of the loading device when the operating time of the loading device is longer than a standard time, the hydraulic oil pressure detected by the pressure detection means exceeds a threshold value, and a predetermined time or more has passed since the operation signal was input from the loading operation switch.

2. A garbage collection truck as described in claim 1, wherein the specified time is set to a time longer than the standard time.

3. 3. The refuse collection vehicle according to claim 1, wherein the control unit, in the above case, stops the operation of the loading device and then operates the loading device in a reverse direction to a predetermined operating position.

4. 4. The refuse collection vehicle according to claim 1, wherein the control unit, in the above case, outputs a command to notify an outside after stopping the operation of the loading device.

5. A dustbin; A trash input box provided at a rear end of the trash storage box so as to be vertically rotatable; A trash bin drive device that rotates the trash bin up and down; a drive operation switch that outputs an operation signal to start driving the input box drive device; A control unit that controls the drive of the input box drive device based on an input of an operation signal from the drive operation switch, The control unit of a garbage collection vehicle stops driving of the drop box drive device when the drive time of the drop box drive device is longer than a standard time and a predetermined time or more has elapsed since the operation signal was input from the drive operation switch.

6. 6. The refuse collection vehicle according to claim 5, wherein the control unit, in the above case, outputs a command to notify an outside after stopping the driving of the throw-in box driving device.

7. The input box drive device is capable of performing a first drive for rotating the trash input box upward and a second drive for rotating the trash input box downward, The drive operation switch outputs a first operation signal for starting the first drive of the trash bin, and a second operation signal for starting the second drive of the trash bin, A garbage collection vehicle as described in claim 5 or claim 6, wherein the control unit, when the drive time of the second drive of the drop box drive device is longer than a standard time and a predetermined time or more has elapsed since the second operation signal was input from the drive operation switch, stops the second drive of the drop box drive device and then causes the drop box drive device to perform the first drive for a certain period of time.

8. A dustbin; a trash input box provided at a rear end of the trash storage box and into which trash is input; a loading device that loads the trash thrown into the trash throwing box into the trash storage box; A hydraulic pump for operating the loading device; a loading operation switch that outputs an operation signal to start the operation of the loading device; a changeover switch for selecting a continuous operation mode in which the loading device repeats a predetermined loading process cycle and a single operation mode in which the loading device executes the loading process cycle only once; a control unit that controls an operation of the loading device based on input of operation signals from the loading operation switch and the changeover switch, a pressure detection means for detecting an operating oil pressure of the hydraulic pump; The control unit stops the operation of the loading device when the operating oil pressure detected by the pressure detection means falls below a threshold value and a predetermined time has elapsed since the operation signal was input from the loading operation switch while the change-over switch is selecting a continuous operation mode.

9. The refuse collection vehicle according to claim 8, wherein the control unit, in the above case, outputs a command to notify an outside party after stopping the operation of the loading device.

Images